31005030 has 64 divisors (see below), whose sum is σ = 85598208. Its totient is φ = 7040640.

The previous prime is 31004977. The next prime is 31005041. The reversal of 31005030 is 3050013.

It is a happy number.

It is a super-2 number, since 2×31005030² = 1922623770601800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31004997 and 31005015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39724 + ... + 40496.

It is an arithmetic number, because the mean of its divisors is an integer number (1337472).

Almost surely, 2^31005030 is an apocalyptic number.

31005030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31005030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42799104).

31005030 is an abundant number, since it is smaller than the sum of its proper divisors (54593178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31005030 is a wasteful number, since it uses less digits than its factorization.

31005030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981.

The product of its (nonzero) digits is 45, while the sum is 12.

The square root of 31005030 is about 5568.2160518428. The cubic root of 31005030 is about 314.1550547984.

Adding to 31005030 its reverse (3050013), we get a palindrome (34055043).

The spelling of 31005030 in words is "thirty-one million, five thousand, thirty".